US4801404A - Boric acid compositions - Google Patents

Boric acid compositions Download PDF

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Publication number
US4801404A
US4801404A US07/096,399 US9639987A US4801404A US 4801404 A US4801404 A US 4801404A US 9639987 A US9639987 A US 9639987A US 4801404 A US4801404 A US 4801404A
Authority
US
United States
Prior art keywords
boric acid
suspension
water
slurry
alkaline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/096,399
Other languages
English (en)
Inventor
Wolf Dietrich
Volker Beez
Eberhard Giebeler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ruetgers Organics GmbH
Original Assignee
Ruetgerswerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ruetgerswerke AG filed Critical Ruetgerswerke AG
Assigned to RUTGERSWERKE AKTIENGESELLSCHAFT, A CORP. OF FED. REPUBLIC OF GERMANY reassignment RUTGERSWERKE AKTIENGESELLSCHAFT, A CORP. OF FED. REPUBLIC OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BEEZ, VOLKER, DIETRICH, WOLF, GIEBELER, EBERHARD
Application granted granted Critical
Publication of US4801404A publication Critical patent/US4801404A/en
Assigned to RUTGERS ORGANICS GMBH reassignment RUTGERS ORGANICS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RUTGERS AKTIENGESELLSCHAFT
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/163—Compounds of boron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/12—Impregnating by coating the surface of the wood with an impregnating paste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C01B35/1045—Oxyacids
    • C01B35/1054—Orthoboric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00—Purpose of the treatment
    • B27K2240/30—Fireproofing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing

Definitions

  • Boric acid and its salts have many commerical uses such as biocide components in wood preservatives such as salt paste wood preservatives and as a fire retardant protection treatment for wood and wood products, especially particle boards and as fire retardant agents.
  • DEP No. 2,140,051 describes highly concentrated solutions of boric acid in water-soluble amines or polyamines but an amine component, which interferes in many uses, is additionally introduced into the resulting mixtures. Also, these amines following application are washed off or washed out or they evaporate during pressing of the particle board and are harmful to the environment. Analogously, the same applies to the solution of boric acid in ethyleneglycol described in European Pat. No 0,046,380.
  • flame retardant wooden particle boards are produced by spraying the wood particles used in the production of the plates before glueing with an aqueous solution of a boron compound and an iorganic acid thereby producing the boric acid directly in finely distributed form on the particles.
  • the method is very elaborate and expensive and because of the acids, which must be precisely proportioned and sprayed, the method is not easy to control and can readily lead to faulty products.
  • novel boric acid suspensions of the invention are comprised of a concentrated, finely dispersed suspension of boric acid and a small amount of a soluble borate salt in an aqueous medium.
  • the preferred molar ratio of boric acid to alkaline agent to form the borate salt is 1.0:0.01 to 1:0.2.
  • the concentrated suspensions of the invention of finely dispersed boric acid with low amounts of borates for use in wood preserving salt paste or in the production of wooden materials ensures as uniform a dispersion of the boric acid as the corresponding solutions of boric acid in organic fluids. Moreover, these suspensions are safe to use and do not harm either the environment or the products containing them with unwanted organic compounds.
  • suspensions of the invention can be produced simply if a slurry of boric acid in water is mixed with an alkaline solution and briefly stirred. By maintaining proper reaction conditions and optionally adding dispersing agents, a suspension having a high degree of storability and long shelf-life is obtained.
  • the alternate method of producing boric acid suspensions from ground boric acid is disadvantageous for the following reasons: the higher the degree of fineness, the more elaborate the grinding process, and the degree of fineness obtained by the method of the invention could only be achieved with very elaborate and expensive setups. Finely ground powders create dust and processing them requires that specific protective regulations must be adhered to.
  • the suspension produced by the invention is not only simpler to prepare but is in ters of properties superior to the suspensions prepared from ground crystal fragments.
  • Starting material is technical grade crystalline or coarsely crystalline boric acid which is prepared as slurry with water, the ratio by weight of boric acid to water being 1:1 to 5:1. This slurry is mixed with an aqueous alkaline solution with brief stirring.
  • boric acid is slightly soluble in water or yields salts with alkaline solutions, the amount of water and thus also the alkaline solution should be kept as small an amount as possible.
  • the slurry must contain enough water so that the boric acid mixture can be stirred, which depends on the method selected and, in the case of stirring for example, also on the kind and force of the stirring device.
  • the alkaline agent added to the aqueous solution reacts with the boric acid forming the corresponding borate in relatively small amounts.
  • the borate content obtained in this way does not interfere.
  • an ammonium borate content is entirely desirable.
  • alkaline solutions are dilute solutions of alkali metal or alkaline earth metal hydroxides or a basic ammonium, alkali metal or alkaline earth metal salt, an ammonia solution or a hot urotopine solution can be used.
  • basic salts are, for example carbonates, phosphates, pyrrophosphates or polyphosphates.
  • Preferred is a concentrated ammonia solution.
  • Small amounts of (0.1 to 1.0% by weight, relative to the total mixture) of commercial grade dispersing agent can be added to the slurry.
  • the boric acid is briefly stirred so that all crystals can interact with the alkaline solution and this stirring can be carried out following a variety of methods known per se, by shaking, for instance, bubbling a gas through, pumping over or preferentially by stirring.
  • the length of time for these treatments is between 15 and 60 minutes, depending on the temperature of the mixture, which can be in the range from 0° to 80° C., the amount of the alkaline solution used, and the crystal size of the used boric acid.
  • boric acid of average crystalline size of 0.2 mm is used, the length of treatment time or the time during which the boric acid must be mixed at room temperature and with a molar boric acid to alkaline ratio of 1:0.05 is approximately 30 minutes. Subsequently, through re-crystallization processes, the mechanism of which is not clear, a suspension is formed with extremely fine boric acid particles and extremely small borate crystals primarily having a range of size below 1000 ⁇ m.
  • boric acid suspensions are highly suitable for preparing flame-retardant wooden particle or fiber board protected against wood-destroying organisms, if it is mixed during the manufacturing process with the particles, the fibers, or the glue of these boards. They are equally suited, together with other effective agents, for producing high-quality wood and fire protective agents in paste form, if dust formation is disturbing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Fireproofing Substances (AREA)
  • Saccharide Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Adhesives Or Adhesive Processes (AREA)
US07/096,399 1986-10-01 1987-09-11 Boric acid compositions Expired - Fee Related US4801404A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3633366 1986-10-01
DE19863633366 DE3633366A1 (de) 1986-10-01 1986-10-01 Verfahren zur herstellung von borsaeure-suspensionen

Publications (1)

Publication Number Publication Date
US4801404A true US4801404A (en) 1989-01-31

Family

ID=6310787

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/096,399 Expired - Fee Related US4801404A (en) 1986-10-01 1987-09-11 Boric acid compositions

Country Status (7)

Country Link
US (1) US4801404A (da)
EP (1) EP0264538B1 (da)
AT (1) ATE51356T1 (da)
CA (1) CA1302013C (da)
DE (2) DE3633366A1 (da)
DK (1) DK165363C (da)
FI (1) FI86972C (da)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5077098A (en) * 1990-01-31 1991-12-31 Canadian Forest Products Ltd. Process for reducing the discoloration of wood
US5430105A (en) * 1992-12-17 1995-07-04 Exxon Chemical Patents Inc. Low sediment process for forming borated dispersant
US5525147A (en) * 1994-02-22 1996-06-11 Perma-Chink Systems, Inc. Preventative treatment of wood
US5532196A (en) * 1993-07-06 1996-07-02 Societe National Des Poudres Et Explosifs Inorganic resins, process for their preparation and materials for heat protection
US5580378A (en) * 1994-12-19 1996-12-03 Shulman; David M. Lightweight cementitious compositions and methods of their production and use
US5601849A (en) * 1994-02-22 1997-02-11 Perma-Chink Systems, Inc. Preventative treatment of wood
US5725652A (en) * 1994-12-19 1998-03-10 Shulman; David M. Lightweight, low water content expanded shale, clay and slate cementitious compositions and methods of their production and use
US5922296A (en) * 1997-10-02 1999-07-13 In-Cide Technologies, Inc. Method for making particulate sodium polyborate
US6273928B1 (en) * 1998-10-19 2001-08-14 U.S. Borax Inc. Pourable aqueous boron-containing compositions and their preparation
US6306317B1 (en) 1998-08-13 2001-10-23 S-T-N Holdings, Inc. Phosphate free fire retardant composition
US6426095B2 (en) 1990-05-24 2002-07-30 Nisus, Corp. Methods and compositions for retarding and eradicating infestation in trees and tree derived products
CN1102880C (zh) * 1998-02-26 2003-03-12 查斯－乔斯特－麦克米兰合伙人公司 复合木制品
US20040258898A1 (en) * 2003-06-20 2004-12-23 Graham Hume Fire retardant composite panel product and a method and system for fabricating same
US20070278463A1 (en) * 2003-12-19 2007-12-06 Ami Agrolinz Melamine International Gmbh Flame-Retardant Mixture for Lignocellulose Composites
US8138106B2 (en) 2005-09-30 2012-03-20 Rayonier Trs Holdings Inc. Cellulosic fibers with odor control characteristics
US20160046036A1 (en) * 2014-08-15 2016-02-18 Rutgers Organics Gmbh COMPOSITION OF A TIMBER FORMULATION COMPRISING Cu SALTS AND ORGANIC CYCLIC INGREDIENTS FOR THE PRESERVATION OF TIMBER FOR DECKS
US9603358B2 (en) 2011-11-04 2017-03-28 Arch Timber Protection Limited Additives for use in wood preservation
US9669564B2 (en) 2014-06-04 2017-06-06 Koppers Performance Chemicals Inc. Methods of conferring fire retardancy to wood and fire-retardant wood products
US10500756B2 (en) 2014-06-04 2019-12-10 Koppers Performance Chemicals Inc. Methods of conferring fire retardancy to wood and fire-retardant wood products
JPWO2020054838A1 (da) * 2018-09-14 2020-03-19
US10703009B2 (en) * 2018-08-22 2020-07-07 Polymer Solutions Group Fine particle size boric acid dispersion, method of use in engineered wood product manufacture, method of coating wood products and product therefrom
US11015081B2 (en) 2018-08-22 2021-05-25 Polymer Solutions Group Fine particle size boric acid/urea dispersion, method of use in engineered wood product manufacture, method of coating wood products and product therefrom
US20230255198A1 (en) * 2020-06-26 2023-08-17 Arxada Ag Methods and Compositions for Use in Glued-Wood Products

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US650689A (en) * 1898-12-01 1900-05-29 Leopold Litynski Composition for fireproofing wood.
US1382618A (en) * 1919-01-11 1921-06-28 Blenio Products Corp Fireproofing solution
US1396264A (en) * 1920-11-13 1921-11-08 Filippo Silvio Di Fireproofing composition
US1612676A (en) * 1923-06-14 1926-12-28 N W Stowell Water and fire proofing composition for wood
US1738976A (en) * 1927-03-11 1929-12-10 Internat Fireproof Products Co Process for fireproofing cellulose
US1793357A (en) * 1928-04-19 1931-02-17 Charles H Brown Composition of matter
US4076540A (en) * 1976-12-09 1978-02-28 Ernest Stossel Fire extinguishing composition
US4156654A (en) * 1978-03-31 1979-05-29 Blasius James R Method for making crude boric acid from borate and sulfuric acid
US4172804A (en) * 1977-11-21 1979-10-30 George Christianson Method of preparing fire retardant insulation
US4212675A (en) * 1978-04-03 1980-07-15 Retroflame International Limited Fireproofing
US4224169A (en) * 1978-10-19 1980-09-23 Promotora De Tecnologia Industrial, S.A. Flame retardant compositions and method of preparing same
US4289662A (en) * 1978-03-31 1981-09-15 Hjh Chemicals, Inc. Method of making crude boric acid from borate and sulfuric acid
US4292188A (en) * 1979-06-01 1981-09-29 Martin Marietta Corporation Non-abrasive bauxite-based fire retardant
US4382025A (en) * 1978-07-24 1983-05-03 Sallay Stephen I Ammoniumtriborate, an effective new flame retardant
US4514326A (en) * 1978-07-24 1985-04-30 Sallay Stephen I Permanent flame retardant and anti-smoldering compositions

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306860A (en) * 1962-05-03 1967-02-28 Archer Daniels Midland Co Liquid boric acid suspension, method and products
CA872192A (en) * 1968-11-15 1971-06-01 H. Riem Roland Fire retardant hardboard

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US650689A (en) * 1898-12-01 1900-05-29 Leopold Litynski Composition for fireproofing wood.
US1382618A (en) * 1919-01-11 1921-06-28 Blenio Products Corp Fireproofing solution
US1396264A (en) * 1920-11-13 1921-11-08 Filippo Silvio Di Fireproofing composition
US1612676A (en) * 1923-06-14 1926-12-28 N W Stowell Water and fire proofing composition for wood
US1738976A (en) * 1927-03-11 1929-12-10 Internat Fireproof Products Co Process for fireproofing cellulose
US1793357A (en) * 1928-04-19 1931-02-17 Charles H Brown Composition of matter
US4076540A (en) * 1976-12-09 1978-02-28 Ernest Stossel Fire extinguishing composition
US4172804A (en) * 1977-11-21 1979-10-30 George Christianson Method of preparing fire retardant insulation
US4156654A (en) * 1978-03-31 1979-05-29 Blasius James R Method for making crude boric acid from borate and sulfuric acid
US4289662A (en) * 1978-03-31 1981-09-15 Hjh Chemicals, Inc. Method of making crude boric acid from borate and sulfuric acid
US4212675A (en) * 1978-04-03 1980-07-15 Retroflame International Limited Fireproofing
US4382025A (en) * 1978-07-24 1983-05-03 Sallay Stephen I Ammoniumtriborate, an effective new flame retardant
US4514326A (en) * 1978-07-24 1985-04-30 Sallay Stephen I Permanent flame retardant and anti-smoldering compositions
US4224169A (en) * 1978-10-19 1980-09-23 Promotora De Tecnologia Industrial, S.A. Flame retardant compositions and method of preparing same
US4292188A (en) * 1979-06-01 1981-09-29 Martin Marietta Corporation Non-abrasive bauxite-based fire retardant

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5077098A (en) * 1990-01-31 1991-12-31 Canadian Forest Products Ltd. Process for reducing the discoloration of wood
US6426095B2 (en) 1990-05-24 2002-07-30 Nisus, Corp. Methods and compositions for retarding and eradicating infestation in trees and tree derived products
US20040062747A1 (en) * 1990-05-24 2004-04-01 Nisus Corporation Methods and compositions for retarding and eradicating infestation in trees and tree derived products
US6630174B2 (en) 1990-05-24 2003-10-07 Nisus Corporation Methods and compositions for retarding and eradicating infestation in trees and tree derived products
US5430105A (en) * 1992-12-17 1995-07-04 Exxon Chemical Patents Inc. Low sediment process for forming borated dispersant
US5532196A (en) * 1993-07-06 1996-07-02 Societe National Des Poudres Et Explosifs Inorganic resins, process for their preparation and materials for heat protection
US5525147A (en) * 1994-02-22 1996-06-11 Perma-Chink Systems, Inc. Preventative treatment of wood
US5601849A (en) * 1994-02-22 1997-02-11 Perma-Chink Systems, Inc. Preventative treatment of wood
US5725652A (en) * 1994-12-19 1998-03-10 Shulman; David M. Lightweight, low water content expanded shale, clay and slate cementitious compositions and methods of their production and use
US5580378A (en) * 1994-12-19 1996-12-03 Shulman; David M. Lightweight cementitious compositions and methods of their production and use
US5922296A (en) * 1997-10-02 1999-07-13 In-Cide Technologies, Inc. Method for making particulate sodium polyborate
CN1102880C (zh) * 1998-02-26 2003-03-12 查斯－乔斯特－麦克米兰合伙人公司 复合木制品
US6306317B1 (en) 1998-08-13 2001-10-23 S-T-N Holdings, Inc. Phosphate free fire retardant composition
US6517748B2 (en) 1998-08-13 2003-02-11 S-T-N Holdings, Inc. Phosphate free fire retardant composition
US6273928B1 (en) * 1998-10-19 2001-08-14 U.S. Borax Inc. Pourable aqueous boron-containing compositions and their preparation
US20050249934A1 (en) * 2003-06-20 2005-11-10 Graham Hume Fire retardant composite panel product and a method and system for fabricating same
US20040258898A1 (en) * 2003-06-20 2004-12-23 Graham Hume Fire retardant composite panel product and a method and system for fabricating same
US7354503B2 (en) * 2003-06-20 2008-04-08 Sierra Pine Ltd. Fire retardant composite panel product and a method and system for fabricating same
US7553538B2 (en) 2003-06-20 2009-06-30 Sierra Pine Ltd Fire retardant composite panel product and a method and system for fabricating same
US7651591B1 (en) 2003-06-20 2010-01-26 Sierra Pine Ltd. Fire retardant composite panel product and a method and system for fabricating same
US20070278463A1 (en) * 2003-12-19 2007-12-06 Ami Agrolinz Melamine International Gmbh Flame-Retardant Mixture for Lignocellulose Composites
US8138106B2 (en) 2005-09-30 2012-03-20 Rayonier Trs Holdings Inc. Cellulosic fibers with odor control characteristics
US8574683B2 (en) 2005-09-30 2013-11-05 Rayonier Trs Holdings, Inc. Method of making a pulp sheet of odor-inhibiting absorbent fibers
US9603358B2 (en) 2011-11-04 2017-03-28 Arch Timber Protection Limited Additives for use in wood preservation
US9961895B2 (en) 2011-11-04 2018-05-08 Arch Timber Protection Limited Additives for use in wood preservation
US9669564B2 (en) 2014-06-04 2017-06-06 Koppers Performance Chemicals Inc. Methods of conferring fire retardancy to wood and fire-retardant wood products
US10500756B2 (en) 2014-06-04 2019-12-10 Koppers Performance Chemicals Inc. Methods of conferring fire retardancy to wood and fire-retardant wood products
US20160046036A1 (en) * 2014-08-15 2016-02-18 Rutgers Organics Gmbh COMPOSITION OF A TIMBER FORMULATION COMPRISING Cu SALTS AND ORGANIC CYCLIC INGREDIENTS FOR THE PRESERVATION OF TIMBER FOR DECKS
US9808954B2 (en) * 2014-08-15 2017-11-07 Rutgers Organics Gmbh Composition of a timber formulation comprising Cu salts and organic cyclic ingredients for the preservation of timber for decks
US10703009B2 (en) * 2018-08-22 2020-07-07 Polymer Solutions Group Fine particle size boric acid dispersion, method of use in engineered wood product manufacture, method of coating wood products and product therefrom
US11015081B2 (en) 2018-08-22 2021-05-25 Polymer Solutions Group Fine particle size boric acid/urea dispersion, method of use in engineered wood product manufacture, method of coating wood products and product therefrom
JPWO2020054838A1 (da) * 2018-09-14 2020-03-19
WO2020054838A1 (ja) * 2018-09-14 2020-03-19 公立大学法人北九州市立大学 不燃材の製造方法および不燃材
US20230255198A1 (en) * 2020-06-26 2023-08-17 Arxada Ag Methods and Compositions for Use in Glued-Wood Products

Also Published As

Publication number Publication date
DK497387A (da) 1988-04-02
DK165363C (da) 1993-04-05
FI86972C (fi) 1992-11-10
FI874292A0 (fi) 1987-09-30
DE3762022D1 (de) 1990-05-03
FI86972B (fi) 1992-07-31
EP0264538B1 (de) 1990-03-28
DK165363B (da) 1992-11-16
ATE51356T1 (de) 1990-04-15
DE3633366A1 (de) 1988-04-14
EP0264538A1 (de) 1988-04-27
DK497387D0 (da) 1987-09-22
FI874292A (fi) 1988-04-02
CA1302013C (en) 1992-06-02

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